The U.S. Immigration and Customs Enforcement has filed a detainer against Volodymyr Zhukovskyy, the Massachusetts man accused of slamming into a group of motorcyclists, killing seven, according to The Boston Herald.

That detainer means Zhukovskyy could be deported.

Zhukovskyy’s father told the Herald that his son recently secured a U.S. green card. They are from Ukraine, said the father, who is also named Volodymyr Zhukovskyy.

“I’m sorry for the families,” the father told the Herald.

On Friday, Zhukovskyy was behind the wheel of a pickup truck towing a trailer when he crashed into the motorcyclists on Route 2 in Randolph, New Hampshire, according to authorities.

The bikers Zhukovskyy struck were members or supporters of the JarHeads MC, a New England motorcycle club that includes Marines and their spouses. They have been identified as Jo-Ann and Edward Corr, both 58, of Lakeville, Massachusetts; Michael Ferazzi, 62, of Contoocook, New Hampshire; Albert Mazza Jr., 59, of Lee, New Hampshire; Desma Oakes, 42, of Concord, New Hampshire; Aaron Perry, 45, of Farmington, New Hampshire; and Daniel Pereira, 58, of Riverside, Rhode Island.

Zhukovskyy was arrested at his West Springfield home Monday. On Tuesday, he entered not-guilty pleas and waived his appearance in Coos County Superior Court, where he was scheduled to face a judge on seven counts of negligent homicide.

A criminal complaint accuses Zhukovskyy, who was driving a 2016 Dodge 2500 pickup truck with an attached trailer, of crossing the double yellow centerline and striking the motorcycle riders in the eastbound lane.

A bail order shows Zhukovskyy was ordered held in “preventive detention” and a judge notes his “criminal and driving history exhibit a pattern of operating a motor vehicle in a dangerous manner.”

Volodymyr Zhukovskyy enters not guilty pleas in NH crash that left 7 people dead: Read the criminal complaint

Zhukovskyy, a 23-year-old West Springfield man who had his driver’s license suspended Monday, is facing seven counts of negligent homicide in the crash that left seven people dead. He was scheduled to appear in Coos County Superior Court in New Hampshire for his arraignment, but he waived his appearance in court.